AbstractVariability of H. annosum behaviour to three monoterpenes. Sensitivity of 23IL. amoson isolates to α‐pinene, β‐pinene and linonene is sitre and compared to results of inoculations in living Norway spruces stems. β‐pinene and limenene are twice as effective as α‐pinene, but the level of inhibition depends on isolares. The percentage of fuiled inoculations is correlated with the sensitivity of isolates